Elevator installation

Abstract

The invention relates to an elevator installation with at least one car, which can be made to travel in a shaft and is connected to a counterweight by means of two cable strands, which are associated with different sides of the car, and with a traction sheave, which can be driven by a motor and over which the two cable strands are led, the car being kept in a suspension ratio of 1:1. In order to develop the elevator installation in such a way that different extension behavior of the two cable strands can be equalized, it is proposed according to the invention that the two cable strands are coupled to each other by means of a cable length equalizing device disposed on the car and/or on the counterweight.

1 . Elevator installation with at least one car, which can be made to travel in a shaft and is connected to a counterweight by means of two cable strands, which are associated with different sides of the car, and with a traction sheave, which can be driven by a motor and over which the two cable strands are led, the car being kept in a suspension ratio of 1:1, wherein the two cable strands are coupled to each other by means of a cable length equalizing device disposed on the car and/or on the counterweight.  
   
   
       2 . Elevator installation according to  claim 1 , wherein the cable length equalizing device is disposed above or below the car or the counterweight.  
   
   
       3 . Elevator installation according to  claim 1 , wherein the cable length equalizing device has two connecting links, by means of which the two cable strands are operatively connected to the car or the counterweight, the cable strands being coupled to each other between the two connecting links or by means of the two connecting links.  
   
   
       4 . Elevator installation according to  claim 3 , wherein the cable strands have a number of individual cables and the connecting links comprise a number of connecting elements, each individual cable being associated with a connecting element and individual cables of the two cable strands being coupled to each other between the respective connecting elements and/or by means of the respective connecting elements.  
   
   
       5 . Elevator installation according to  claim 3 , wherein an arresting device is disposed between the connecting links for the nondisplaceable securement of the cable strands in relation to the car or the counterweight.  
   
   
       6 . Elevator installation according to  claim 5 , wherein the arresting device comprises a cable clamp.  
   
   
       7 . Elevator installation according to  claim 3 , wherein at least one cable tension equalizing element is associated with the connecting links for equalizing the cable tensions prevailing in the cable strands.  
   
   
       8 . Elevator installation according to  claim 7 , wherein the cable strands have a number of individual cables and the connecting links have a number of associated cable tension equalizing elements for equalizing the cable tensions prevailing in the individual cables.  
   
   
       9 . Elevator installation according to  claim 7 , wherein at least one cable tension equalizing element is disposed between a cable strand and a connecting link.  
   
   
       10 . Elevator installation according to  claim 7 , wherein at least one cable tension equalizing element is disposed between a connecting link and the car or the counterweight.  
   
   
       11 . Elevator installation according to  claim 7 , wherein the cable tension equalizing element comprises a spring element.  
   
   
       12 . Elevator installation according to  claim 3 , wherein the two connecting links are coupled to each other by means of a cable length equalizing element.  
   
   
       13 . Elevator installation according to  claim 12 , wherein the cable length equalizing element comprises a linear adjusting system.  
   
   
       14 . Elevator installation according to  claim 3 , wherein the connecting links are disposed at a distance from each other and the two cable strands are connected to each other between the connecting links.  
   
   
       15 . Elevator installation according to  claim 3 , wherein the connecting links are configured as deflecting elements, which are disposed at a distance from each other and around which a cable strand is respectively led.  
   
   
       16 . Elevator installation according to  claim 15 , wherein the deflecting elements are configured as freely rotatable deflecting rollers.  
   
   
       17 . Elevator installation according to  claim 16 , wherein the two cable strands have a number of individual cables and the deflecting rollers comprise a number of deflecting sheaves, each individual cable being led around a separate deflecting sheave.  
   
   
       18 . Elevator installation according to  claim 17 , wherein the deflecting sheaves of a deflecting roller are held rotatably in relation to each other.  
   
   
       19 . Elevator installation according to  claim 15 , wherein the deflecting elements are held on a common carrier, which is disposed on the car or on the counterweight.  
   
   
       20 . Elevator installation according to  claim 15 , wherein the deflecting elements are respectively held on a separate carrier, which is disposed on the car or on the counterweight.  
   
   
       21 . Elevator installation according to  claim 15 , wherein the deflecting elements are held on the car or on the counterweight by means of a spring element.  
   
   
       22 . Elevator installation according  claim 15 , wherein the deflecting elements are held on the car or on the counterweight by means of a linear adjusting system.  
   
   
       23 . Elevator installation according to  claim 15 , wherein the distance between the deflecting elements is changeable.  
   
   
       24 . Elevator installation according to  claim 23 , wherein the distance between the deflecting elements is changeable by means of a linear adjusting system.  
   
   
       25 . Elevator installation according to one of  claim 3 , wherein the connecting elements respectively form a pivotably mounted lever arm, on which a cable strand is held.  
   
   
       26 . Elevator installation according to  claim 25 , wherein the lever arms have a number of lever arm elements, on each of which an individual cable of the cable strand is held.  
   
   
       27 . Elevator installation according to  claim 26 , wherein the lever arm elements of each lever arm are pivotably held in relation to each other.  
   
   
       28 . Elevator installation according to  claim 25 , wherein the lever arms are rigidly connected to each other and form a rocker.  
   
   
       29 . Elevator installation according to  claim 28 , wherein the rocker is pivotably held in the region of a vertical center axis of the car or of the counterweight.  
   
   
       30 . Elevator installation according to  claim 28 , wherein the two cable strands have a different number of individual cables and the rocker is pivotably held offset in the direction of the cable strand with the greater number of individual cables in relation to the vertical center axis of the car or of the counterweight.  
   
   
       31 . Elevator installation according to  claim 28 , wherein the elevator installation comprises a sensor adapted to monitor the pivoting movement of the rocker.  
   
   
       32 . Elevator installation according to  claim 31 , wherein the sensor is adapted to output a control signal when a predetermined pivoting angle of the rocker is exceeded.  
   
   
       33 . Elevator installation according to  claim 3 , wherein the two connecting links are configured as pivotably mounted angle levers, with a first side arm and a second side arm aligned at an angle to said first side arm, a cable strand being held on the first side arm and the second side arms being connected to each other by means of a coupling link.  
   
   
       34 . Elevator installation according to  claim 33 , wherein the coupling link comprises a spring element.  
   
   
       35 . Elevator installation according to  claim 33 , wherein the coupling link comprises a linear adjusting system.  
   
   
       36 . Elevator installation according to  claim 33 , wherein the cable strands comprise a number of individual cables and the angle levers have a number of angle lever elements with a first and a second side arm, an individual cable being respectively held on a first side arm of an angle lever element and the second side arms of two angle lever elements being connected to each other by means of a coupling link.  
   
   
       37 . Elevator installation according to  claim 36 , wherein the angle lever elements are pivotably held in relation to each other.